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CPT-subset?

CDM Builders
#1

Quick question–there are ~8000 CPT concepts in OMOP, whereas there are 27418 in UMLS. I used athena to download the vocabularies and the cpt4.jar tool to merge CPT into the CDM. What subset of CPT is this? I know UMLS uses CPT’s Developers Toolkit (DTK). Which version of these? Are there additional codes/mappings to snomed available anywhere?

Primarily, I need the full CPT hierarchy and any available crosswalks between CPT and SNOMED.

Thanks,

Ryan

#2

@rv816:

Not sure I got your numbers:

select count(distinct code) from umls.mrconso where sab=‘CPT’; - 13091
select count(8) from concept where vocabulary_id=‘CPT4’; - 14202

We got 900ish more CPT4 codes, which were valid at some point in time but UMLS does no longer carry them.

Christian

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